mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-29 23:24:11 +08:00
clk: keystone: sci-clk: add support for dynamically probing clocks
Currently, the driver contains a large hints table for clocks that exist on a device, however, it is possible to probe the clocks from the firmware also. Add support for this, and drop the clock hints table support from the driver completely. This causes the driver to send a few extra sci-clk messages during boot, basically one extra for each device that exists on the SoC; on K2G this is approx 80. Signed-off-by: Tero Kristo <t-kristo@ti.com> Acked-by: Santosh Shilimkar <ssantosh@kernel.org>
This commit is contained in:
Tero Kristo
parent
ee2fc3c5ca
commit
3c13933c60
@ -28,22 +28,11 @@
|
||||
#define SCI_CLK_ALLOW_FREQ_CHANGE BIT(1)
|
||||
#define SCI_CLK_INPUT_TERMINATION BIT(2)
|
||||
|
||||
/**
|
||||
* struct sci_clk_data - TI SCI clock data
|
||||
* @dev: device index
|
||||
* @num_clks: number of clocks for this device
|
||||
*/
|
||||
struct sci_clk_data {
|
||||
u16 dev;
|
||||
u16 num_clks;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct sci_clk_provider - TI SCI clock provider representation
|
||||
* @sci: Handle to the System Control Interface protocol handler
|
||||
* @ops: Pointer to the SCI ops to be used by the clocks
|
||||
* @dev: Device pointer for the clock provider
|
||||
* @clk_data: Clock data
|
||||
* @clocks: Clocks array for this device
|
||||
* @num_clocks: Total number of clocks for this provider
|
||||
*/
|
||||
@ -51,8 +40,7 @@ struct sci_clk_provider {
|
||||
const struct ti_sci_handle *sci;
|
||||
const struct ti_sci_clk_ops *ops;
|
||||
struct device *dev;
|
||||
const struct sci_clk_data *clk_data;
|
||||
struct clk_hw **clocks;
|
||||
struct sci_clk **clocks;
|
||||
int num_clocks;
|
||||
};
|
||||
|
||||
@ -61,6 +49,7 @@ struct sci_clk_provider {
|
||||
* @hw: Hardware clock cookie for common clock framework
|
||||
* @dev_id: Device index
|
||||
* @clk_id: Clock index
|
||||
* @num_parents: Number of parents for this clock
|
||||
* @provider: Master clock provider
|
||||
* @flags: Flags for the clock
|
||||
*/
|
||||
@ -68,6 +57,7 @@ struct sci_clk {
|
||||
struct clk_hw hw;
|
||||
u16 dev_id;
|
||||
u8 clk_id;
|
||||
u8 num_parents;
|
||||
struct sci_clk_provider *provider;
|
||||
u8 flags;
|
||||
};
|
||||
@ -273,38 +263,22 @@ static const struct clk_ops sci_clk_ops = {
|
||||
/**
|
||||
* _sci_clk_get - Gets a handle for an SCI clock
|
||||
* @provider: Handle to SCI clock provider
|
||||
* @dev_id: device ID for the clock to register
|
||||
* @clk_id: clock ID for the clock to register
|
||||
* @sci_clk: Handle to the SCI clock to populate
|
||||
*
|
||||
* Gets a handle to an existing TI SCI hw clock, or builds a new clock
|
||||
* entry and registers it with the common clock framework. Called from
|
||||
* the common clock framework, when a corresponding of_clk_get call is
|
||||
* executed, or recursively from itself when parsing parent clocks.
|
||||
* Returns a pointer to the hw clock struct, or ERR_PTR value in failure.
|
||||
* Returns 0 on success, negative error code on failure.
|
||||
*/
|
||||
static struct clk_hw *_sci_clk_build(struct sci_clk_provider *provider,
|
||||
u16 dev_id, u8 clk_id)
|
||||
static int _sci_clk_build(struct sci_clk_provider *provider,
|
||||
struct sci_clk *sci_clk)
|
||||
{
|
||||
struct clk_init_data init = { NULL };
|
||||
struct sci_clk *sci_clk = NULL;
|
||||
char *name = NULL;
|
||||
char **parent_names = NULL;
|
||||
int i;
|
||||
int ret;
|
||||
|
||||
sci_clk = devm_kzalloc(provider->dev, sizeof(*sci_clk), GFP_KERNEL);
|
||||
if (!sci_clk)
|
||||
return ERR_PTR(-ENOMEM);
|
||||
|
||||
sci_clk->dev_id = dev_id;
|
||||
sci_clk->clk_id = clk_id;
|
||||
sci_clk->provider = provider;
|
||||
|
||||
ret = provider->ops->get_num_parents(provider->sci, dev_id,
|
||||
clk_id,
|
||||
&init.num_parents);
|
||||
if (ret)
|
||||
goto err;
|
||||
int ret = 0;
|
||||
|
||||
name = kasprintf(GFP_KERNEL, "%s:%d:%d", dev_name(provider->dev),
|
||||
sci_clk->dev_id, sci_clk->clk_id);
|
||||
@ -317,11 +291,11 @@ static struct clk_hw *_sci_clk_build(struct sci_clk_provider *provider,
|
||||
* to have mux functionality. Otherwise it is going to act as a root
|
||||
* clock.
|
||||
*/
|
||||
if (init.num_parents < 2)
|
||||
init.num_parents = 0;
|
||||
if (sci_clk->num_parents < 2)
|
||||
sci_clk->num_parents = 0;
|
||||
|
||||
if (init.num_parents) {
|
||||
parent_names = kcalloc(init.num_parents, sizeof(char *),
|
||||
if (sci_clk->num_parents) {
|
||||
parent_names = kcalloc(sci_clk->num_parents, sizeof(char *),
|
||||
GFP_KERNEL);
|
||||
|
||||
if (!parent_names) {
|
||||
@ -329,7 +303,7 @@ static struct clk_hw *_sci_clk_build(struct sci_clk_provider *provider,
|
||||
goto err;
|
||||
}
|
||||
|
||||
for (i = 0; i < init.num_parents; i++) {
|
||||
for (i = 0; i < sci_clk->num_parents; i++) {
|
||||
char *parent_name;
|
||||
|
||||
parent_name = kasprintf(GFP_KERNEL, "%s:%d:%d",
|
||||
@ -346,6 +320,7 @@ static struct clk_hw *_sci_clk_build(struct sci_clk_provider *provider,
|
||||
}
|
||||
|
||||
init.ops = &sci_clk_ops;
|
||||
init.num_parents = sci_clk->num_parents;
|
||||
sci_clk->hw.init = &init;
|
||||
|
||||
ret = devm_clk_hw_register(provider->dev, &sci_clk->hw);
|
||||
@ -354,7 +329,7 @@ static struct clk_hw *_sci_clk_build(struct sci_clk_provider *provider,
|
||||
|
||||
err:
|
||||
if (parent_names) {
|
||||
for (i = 0; i < init.num_parents; i++)
|
||||
for (i = 0; i < sci_clk->num_parents; i++)
|
||||
kfree(parent_names[i]);
|
||||
|
||||
kfree(parent_names);
|
||||
@ -362,10 +337,7 @@ err:
|
||||
|
||||
kfree(name);
|
||||
|
||||
if (ret)
|
||||
return ERR_PTR(ret);
|
||||
|
||||
return &sci_clk->hw;
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int _cmp_sci_clk(const void *a, const void *b)
|
||||
@ -414,253 +386,20 @@ static struct clk_hw *sci_clk_get(struct of_phandle_args *clkspec, void *data)
|
||||
|
||||
static int ti_sci_init_clocks(struct sci_clk_provider *p)
|
||||
{
|
||||
const struct sci_clk_data *data = p->clk_data;
|
||||
struct clk_hw *hw;
|
||||
int i;
|
||||
int num_clks = 0;
|
||||
int ret;
|
||||
|
||||
while (data->num_clks) {
|
||||
num_clks += data->num_clks;
|
||||
data++;
|
||||
}
|
||||
|
||||
p->num_clocks = num_clks;
|
||||
|
||||
p->clocks = devm_kcalloc(p->dev, num_clks, sizeof(struct sci_clk),
|
||||
GFP_KERNEL);
|
||||
if (!p->clocks)
|
||||
return -ENOMEM;
|
||||
|
||||
num_clks = 0;
|
||||
|
||||
data = p->clk_data;
|
||||
|
||||
while (data->num_clks) {
|
||||
for (i = 0; i < data->num_clks; i++) {
|
||||
hw = _sci_clk_build(p, data->dev, i);
|
||||
if (!IS_ERR(hw)) {
|
||||
p->clocks[num_clks++] = hw;
|
||||
continue;
|
||||
}
|
||||
|
||||
/* Skip any holes in the clock lists */
|
||||
if (PTR_ERR(hw) == -ENODEV)
|
||||
continue;
|
||||
|
||||
return PTR_ERR(hw);
|
||||
}
|
||||
data++;
|
||||
for (i = 0; i < p->num_clocks; i++) {
|
||||
ret = _sci_clk_build(p, p->clocks[i]);
|
||||
if (ret)
|
||||
return ret;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct sci_clk_data k2g_clk_data[] = {
|
||||
/* pmmc */
|
||||
{ .dev = 0x0, .num_clks = 4 },
|
||||
|
||||
/* mlb0 */
|
||||
{ .dev = 0x1, .num_clks = 5 },
|
||||
|
||||
/* dss0 */
|
||||
{ .dev = 0x2, .num_clks = 2 },
|
||||
|
||||
/* mcbsp0 */
|
||||
{ .dev = 0x3, .num_clks = 8 },
|
||||
|
||||
/* mcasp0 */
|
||||
{ .dev = 0x4, .num_clks = 8 },
|
||||
|
||||
/* mcasp1 */
|
||||
{ .dev = 0x5, .num_clks = 8 },
|
||||
|
||||
/* mcasp2 */
|
||||
{ .dev = 0x6, .num_clks = 8 },
|
||||
|
||||
/* dcan0 */
|
||||
{ .dev = 0x8, .num_clks = 2 },
|
||||
|
||||
/* dcan1 */
|
||||
{ .dev = 0x9, .num_clks = 2 },
|
||||
|
||||
/* emif0 */
|
||||
{ .dev = 0xa, .num_clks = 6 },
|
||||
|
||||
/* mmchs0 */
|
||||
{ .dev = 0xb, .num_clks = 3 },
|
||||
|
||||
/* mmchs1 */
|
||||
{ .dev = 0xc, .num_clks = 3 },
|
||||
|
||||
/* gpmc0 */
|
||||
{ .dev = 0xd, .num_clks = 1 },
|
||||
|
||||
/* elm0 */
|
||||
{ .dev = 0xe, .num_clks = 1 },
|
||||
|
||||
/* spi0 */
|
||||
{ .dev = 0x10, .num_clks = 1 },
|
||||
|
||||
/* spi1 */
|
||||
{ .dev = 0x11, .num_clks = 1 },
|
||||
|
||||
/* spi2 */
|
||||
{ .dev = 0x12, .num_clks = 1 },
|
||||
|
||||
/* spi3 */
|
||||
{ .dev = 0x13, .num_clks = 1 },
|
||||
|
||||
/* icss0 */
|
||||
{ .dev = 0x14, .num_clks = 6 },
|
||||
|
||||
/* icss1 */
|
||||
{ .dev = 0x15, .num_clks = 6 },
|
||||
|
||||
/* usb0 */
|
||||
{ .dev = 0x16, .num_clks = 7 },
|
||||
|
||||
/* usb1 */
|
||||
{ .dev = 0x17, .num_clks = 7 },
|
||||
|
||||
/* nss0 */
|
||||
{ .dev = 0x18, .num_clks = 14 },
|
||||
|
||||
/* pcie0 */
|
||||
{ .dev = 0x19, .num_clks = 1 },
|
||||
|
||||
/* gpio0 */
|
||||
{ .dev = 0x1b, .num_clks = 1 },
|
||||
|
||||
/* gpio1 */
|
||||
{ .dev = 0x1c, .num_clks = 1 },
|
||||
|
||||
/* timer64_0 */
|
||||
{ .dev = 0x1d, .num_clks = 9 },
|
||||
|
||||
/* timer64_1 */
|
||||
{ .dev = 0x1e, .num_clks = 9 },
|
||||
|
||||
/* timer64_2 */
|
||||
{ .dev = 0x1f, .num_clks = 9 },
|
||||
|
||||
/* timer64_3 */
|
||||
{ .dev = 0x20, .num_clks = 9 },
|
||||
|
||||
/* timer64_4 */
|
||||
{ .dev = 0x21, .num_clks = 9 },
|
||||
|
||||
/* timer64_5 */
|
||||
{ .dev = 0x22, .num_clks = 9 },
|
||||
|
||||
/* timer64_6 */
|
||||
{ .dev = 0x23, .num_clks = 9 },
|
||||
|
||||
/* msgmgr0 */
|
||||
{ .dev = 0x25, .num_clks = 1 },
|
||||
|
||||
/* bootcfg0 */
|
||||
{ .dev = 0x26, .num_clks = 1 },
|
||||
|
||||
/* arm_bootrom0 */
|
||||
{ .dev = 0x27, .num_clks = 1 },
|
||||
|
||||
/* dsp_bootrom0 */
|
||||
{ .dev = 0x29, .num_clks = 1 },
|
||||
|
||||
/* debugss0 */
|
||||
{ .dev = 0x2b, .num_clks = 8 },
|
||||
|
||||
/* uart0 */
|
||||
{ .dev = 0x2c, .num_clks = 1 },
|
||||
|
||||
/* uart1 */
|
||||
{ .dev = 0x2d, .num_clks = 1 },
|
||||
|
||||
/* uart2 */
|
||||
{ .dev = 0x2e, .num_clks = 1 },
|
||||
|
||||
/* ehrpwm0 */
|
||||
{ .dev = 0x2f, .num_clks = 1 },
|
||||
|
||||
/* ehrpwm1 */
|
||||
{ .dev = 0x30, .num_clks = 1 },
|
||||
|
||||
/* ehrpwm2 */
|
||||
{ .dev = 0x31, .num_clks = 1 },
|
||||
|
||||
/* ehrpwm3 */
|
||||
{ .dev = 0x32, .num_clks = 1 },
|
||||
|
||||
/* ehrpwm4 */
|
||||
{ .dev = 0x33, .num_clks = 1 },
|
||||
|
||||
/* ehrpwm5 */
|
||||
{ .dev = 0x34, .num_clks = 1 },
|
||||
|
||||
/* eqep0 */
|
||||
{ .dev = 0x35, .num_clks = 1 },
|
||||
|
||||
/* eqep1 */
|
||||
{ .dev = 0x36, .num_clks = 1 },
|
||||
|
||||
/* eqep2 */
|
||||
{ .dev = 0x37, .num_clks = 1 },
|
||||
|
||||
/* ecap0 */
|
||||
{ .dev = 0x38, .num_clks = 1 },
|
||||
|
||||
/* ecap1 */
|
||||
{ .dev = 0x39, .num_clks = 1 },
|
||||
|
||||
/* i2c0 */
|
||||
{ .dev = 0x3a, .num_clks = 1 },
|
||||
|
||||
/* i2c1 */
|
||||
{ .dev = 0x3b, .num_clks = 1 },
|
||||
|
||||
/* i2c2 */
|
||||
{ .dev = 0x3c, .num_clks = 1 },
|
||||
|
||||
/* edma0 */
|
||||
{ .dev = 0x3f, .num_clks = 2 },
|
||||
|
||||
/* semaphore0 */
|
||||
{ .dev = 0x40, .num_clks = 1 },
|
||||
|
||||
/* intc0 */
|
||||
{ .dev = 0x41, .num_clks = 1 },
|
||||
|
||||
/* gic0 */
|
||||
{ .dev = 0x42, .num_clks = 1 },
|
||||
|
||||
/* qspi0 */
|
||||
{ .dev = 0x43, .num_clks = 5 },
|
||||
|
||||
/* arm_64b_counter0 */
|
||||
{ .dev = 0x44, .num_clks = 2 },
|
||||
|
||||
/* tetris0 */
|
||||
{ .dev = 0x45, .num_clks = 2 },
|
||||
|
||||
/* cgem0 */
|
||||
{ .dev = 0x46, .num_clks = 2 },
|
||||
|
||||
/* msmc0 */
|
||||
{ .dev = 0x47, .num_clks = 1 },
|
||||
|
||||
/* cbass0 */
|
||||
{ .dev = 0x49, .num_clks = 1 },
|
||||
|
||||
/* board0 */
|
||||
{ .dev = 0x4c, .num_clks = 36 },
|
||||
|
||||
/* edma1 */
|
||||
{ .dev = 0x4f, .num_clks = 2 },
|
||||
{ .num_clks = 0 },
|
||||
};
|
||||
|
||||
static const struct of_device_id ti_sci_clk_of_match[] = {
|
||||
{ .compatible = "ti,k2g-sci-clk", .data = &k2g_clk_data },
|
||||
{ .compatible = "ti,k2g-sci-clk" },
|
||||
{ /* Sentinel */ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, ti_sci_clk_of_match);
|
||||
@ -681,12 +420,16 @@ static int ti_sci_clk_probe(struct platform_device *pdev)
|
||||
struct device_node *np = dev->of_node;
|
||||
struct sci_clk_provider *provider;
|
||||
const struct ti_sci_handle *handle;
|
||||
const struct sci_clk_data *data;
|
||||
int ret;
|
||||
|
||||
data = of_device_get_match_data(dev);
|
||||
if (!data)
|
||||
return -EINVAL;
|
||||
int num_clks = 0;
|
||||
struct sci_clk **clks = NULL;
|
||||
struct sci_clk **tmp_clks;
|
||||
struct sci_clk *sci_clk;
|
||||
int max_clks = 0;
|
||||
int clk_id = 0;
|
||||
int dev_id = 0;
|
||||
u8 num_parents;
|
||||
int gap_size = 0;
|
||||
|
||||
handle = devm_ti_sci_get_handle(dev);
|
||||
if (IS_ERR(handle))
|
||||
@ -696,12 +439,69 @@ static int ti_sci_clk_probe(struct platform_device *pdev)
|
||||
if (!provider)
|
||||
return -ENOMEM;
|
||||
|
||||
provider->clk_data = data;
|
||||
|
||||
provider->sci = handle;
|
||||
provider->ops = &handle->ops.clk_ops;
|
||||
provider->dev = dev;
|
||||
|
||||
while (1) {
|
||||
ret = provider->ops->get_num_parents(provider->sci, dev_id,
|
||||
clk_id, &num_parents);
|
||||
if (ret) {
|
||||
gap_size++;
|
||||
if (!clk_id) {
|
||||
if (gap_size >= 5)
|
||||
break;
|
||||
dev_id++;
|
||||
} else {
|
||||
if (gap_size >= 2) {
|
||||
dev_id++;
|
||||
clk_id = 0;
|
||||
gap_size = 0;
|
||||
} else {
|
||||
clk_id++;
|
||||
}
|
||||
}
|
||||
continue;
|
||||
}
|
||||
|
||||
gap_size = 0;
|
||||
|
||||
if (num_clks == max_clks) {
|
||||
tmp_clks = devm_kmalloc_array(dev, max_clks + 64,
|
||||
sizeof(sci_clk),
|
||||
GFP_KERNEL);
|
||||
memcpy(tmp_clks, clks, max_clks * sizeof(sci_clk));
|
||||
if (max_clks)
|
||||
devm_kfree(dev, clks);
|
||||
max_clks += 64;
|
||||
clks = tmp_clks;
|
||||
}
|
||||
|
||||
sci_clk = devm_kzalloc(dev, sizeof(*sci_clk), GFP_KERNEL);
|
||||
if (!sci_clk)
|
||||
return -ENOMEM;
|
||||
sci_clk->dev_id = dev_id;
|
||||
sci_clk->clk_id = clk_id;
|
||||
sci_clk->provider = provider;
|
||||
sci_clk->num_parents = num_parents;
|
||||
|
||||
clks[num_clks] = sci_clk;
|
||||
|
||||
clk_id++;
|
||||
num_clks++;
|
||||
}
|
||||
|
||||
provider->clocks = devm_kmalloc_array(dev, num_clks, sizeof(sci_clk),
|
||||
GFP_KERNEL);
|
||||
if (!provider->clocks)
|
||||
return -ENOMEM;
|
||||
|
||||
memcpy(provider->clocks, clks, num_clks * sizeof(sci_clk));
|
||||
|
||||
provider->num_clocks = num_clks;
|
||||
|
||||
devm_kfree(dev, clks);
|
||||
|
||||
ret = ti_sci_init_clocks(provider);
|
||||
if (ret) {
|
||||
pr_err("ti-sci-init-clocks failed.\n");
|
||||
|
||||
Loading…
Reference in New Issue
Block a user